Question

我有以下示例JSON，我想获得像Dribbble，Behance这样的列的名称......

request({
    url: url,
    json: true
}, function (error, response, body) {

    if (!error && response.statusCode === 200) {
        callback(body)
        var json = body.result;

        for (var key in json) {
            if (json.hasOwnProperty(key)) {
                var column = Object.keys(key);
                console.log(column[0]); 
            }
        }

    }
})

我正在使用Request模块，它返回JSON很好，但我很难以字符串格式获取列名。如果我至少可以获得数字格式的列，我将能够知道它是否是正确的列，但我得到的是两个0。

{{1}}

Answer 1

var json = { 
  "status": 200,
  "success": true,
  "result": [
    { 
        "Dribbble": 'a',
        "Behance": '',
        "Blog": 'http://blog.invisionapp.com/reimagine-web-design-process/',
        "Youtube": '',
        "Vimeo": '' 
    },
    { 
       "Dribbble": '',
       "Behance": '',
       "Blog": 'http://creative.mailchimp.com/paint-drips/?_ga=1.32574201.612462484.1431430487',
       "Youtube": '',
       "Vimeo": '' } 
  ] 
}
// get the results (useful data) somewhere
var results = json["result"];
// get the first result set, or you can loop trhrough all, assuming that each reuslt set is the same. 
if (results.length > 0){ 
  var columnsIn = results[0]; 
  for(var key in columnsIn){
    console.log(key); // here is your column name you are looking for
  } 
}else{
    console.log("No columns");
}

此代码段应指向正确的方向

Answer 2

关闭Chad Peruggia的代码，你可以通过这样做打印出结果数组中的每个键值对：

var json = { 
  "status": 200,
  "success": true,
  "result": [
    { 
        "Dribbble": 'a',
        "Behance": '',
        "Blog": 'http://blog.invisionapp.com/reimagine-web-design-process/',
        "Youtube": '',
        "Vimeo": '' 
    },
    { 
       "Dribbble": '',
       "Behance": '',
       "Blog": 'http://creative.mailchimp.com/paint-drips/?_ga=1.32574201.612462484.1431430487',
       "Youtube": '',
       "Vimeo": '' } 
  ] 
}
// get the results (useful data) somewhere
var results = json["result"];
// you can loop through all, assuming that each result set is the same. 
if (results.length > 0) { 
    // iterating through the results array
    for(var i = 0; i < results.length; i++) {
        // get i-th object in the results array  
        var columnsIn = results[i];
        // loop through every key in the object
        for(var key in columnsIn){
            console.log(key + ' : ' + results[i][key]); // here is your column name you are looking for + its value
        } 
    }
}
else {
    console.log("No columns");
}

从JSON获取列名

2 个答案: